J4 ›› 2015, Vol. 42 ›› Issue (1): 207-212.doi: 10.3969/j.issn.1001-2400.2015.01.033

• 研究论文 • 上一篇    

卫星星载后置非线性失真消除算法

唐成凯1;廉保旺1;张玲玲2
  

  1. (1. 西北工业大学 电子信息学院,陕西 西安  710072;
    2. 西北工业大学 航海学院,陕西 西安  710072
  • 收稿日期:2014-10-20 出版日期:2015-02-20 发布日期:2015-04-14
  • 通讯作者: 唐成凯
  • 作者简介:唐成凯(1985- ),男,西北工业大学博士研究生,E-mail: tangchengkai99@163.com.
  • 基金资助:

    国家自然科学基金资助项目(61202394,61301094)

Post nonlinear interference cancelation algorithm in satellite communication

TANG Chengkai1;LIAN Baowang1;ZHANG Lingling2   

  1. (1. School of Electronics and Information, Northwestern Polytechnical University, Xi'an 710072, China;
    2. School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China)
  • Received:2014-10-20 Online:2015-02-20 Published:2015-04-14
  • Contact: TANG Chengkai

摘要:

针对前置预失真器不能有效消除高阶信号调制所引起的卫星星载功率放大器的非线性干扰和记忆性干扰,提出了一种后置非线性失真消除算法.该算法根据卫星通信标准DVB-S2下的高阶信号具有多个幅度的特点,结合功率放大器的记忆特性,建立了一种可自适应调节的非线性失真消除模块来实现卫星输出信号的线性化.在卫星输入信号的载波频率较大时,该算法可以有效解决多幅度调制所产生的非线性干扰和记忆干扰.从误码率和星座图两个方面对该算法进行仿真分析,结果表明,所设计的后置非线性失真消除算法可以有效降低高阶调制信号所带来的非线性干扰和记忆性干扰的影响,具有较好的应用价值.

关键词: 卫星通信, 非线性失真消除, 记忆性, 非线性

Abstract:

Aimed at the fact that predistortion can not cancel the nonlinear interference and memory interference which are caused by the power amplifier in the satellite and the high order modulation of the signal, a post nonlinear interference cancellation algorithm is proposed. Based on the fact that the high order signal under the DVB-S2 has the multiple amplitude, and combined with the memory of the amplifier, the algorithm builds an adaptive nonlinear interference cancellation module to realize the linearization of the satellite's output signal. The algorithm can be used by high order modulation and it can remove the nonlinear effect of the satellite's power amplifier perfectly. Simulation results about the bit error radio, power spectrum power and constellation show that our proposed algorithm can eliminate the nonlinear and memory interference.

Key words: satellite communication, nonlinear interference cancelation, memory, nonlinear

中图分类号: 

  • TP722